You have presented a few schematics, but I would prefer to have also seen your documentation and arguments for why you have chosen to have done it the way you have.Put together a full description of what you intend, and also do it diagrammatically, for example a collection of boxes with the linkages needed. This applies to both the hardware and software.It would include things like a strain gauge block, with all the specifications on the expected strain, how will the gauges be applied to the structure, what type of gauge, its specs, together with the gain needed to to get the sort of dynamic range you need. You will need to digitize the analog signal, how many bits, sampling rate, and power are a few of the things that need to be considered. Without getting the transducer section worked through carefully, the project will be doomed from the start.If it is to be a low power network, then you need to factor that in through the whole hardware design process, what parts use the most power?Do the wireless nodes need to be able to communicate with each other, as in a mesh, or can you use a single gateway, so wireless range, power, topology, data rate, wireless band etc. all need to be considered.Just a few thoughts, Cheers,
Richard